diff --git a/drivers/mfd/jz4740-adc.c b/drivers/mfd/jz4740-adc.c
index 563654c9b19eee17165f7b916516853ddafddeca..1e9ee533eacb8d204e860f9881d58e2675adf126 100644
--- a/drivers/mfd/jz4740-adc.c
+++ b/drivers/mfd/jz4740-adc.c
@@ -328,7 +328,7 @@ static int __devexit jz4740_adc_remove(struct platform_device *pdev)
 	return 0;
 }
 
-struct platform_driver jz4740_adc_driver = {
+static struct platform_driver jz4740_adc_driver = {
 	.probe	= jz4740_adc_probe,
 	.remove = __devexit_p(jz4740_adc_remove),
 	.driver = {